Crocodoc was founded in 2007, and its document rendering and viewing technology is used by services including Microsoft's Yammer, Facebook, LinkedIn and BlackBoard.

Box, which has more than 150,000 business customers and 15 million end users, also plans to make the Crocodoc API (application programming interface) a core piece of its application development platform so that the technology can be tapped by third-party application vendors.

The entire seven-person Crocodoc team will join Box, and its CEO, Ryan Damico, will become Box's platform director. Box said it will continue to support Crocodoc's existing customers.